LQTT Series 400kV/140kVA High-Voltage Test Transformer

Precision Testing for Demanding High-Voltage Applications

Key Specifications

Critical Performance Metrics

✅ No-Load Current: <10% of rated input current
✅ Waveform Distortion: <5% THD (Total Harmonic Distortion)
✅ Impedance Voltage: ≤10%
✅ Partial Discharge (PD) Level: <5 pC at 100% rated output voltage (complete test system)
✅ Thermal Performance:

• Winding temperature rise: ≤65 K

• Top-oil temperature rise: ≤55 K

Operational Capabilities

• Maximum Duty Cycle:

• 60 minutes continuous operation at 100% rated voltage & current

• Continuous Rating:

• Unlimited operation at ≤80% rated voltage & current

Technical Advantages

1. Ultra-Low Partial Discharge

Meets stringent requirements for sensitive HV testing applications (e.g., cable, GIS, transformer validation) with <5 pC PD at full voltage – exceeding industry benchmarks.

2. Thermal Reliability

Optimized ONAN cooling ensures safe temperature rises (ΔT ≤65K winding / ≤55K oil) during extended operation, preventing insulation degradation.

3. Precision Waveform Integrity

<5% waveform deviation guarantees accurate test results for harmonics-sensitive applications per IEC 60076 standards.

4. Robust Safety Compliance

Designed to exceed IEC 61010-1 safety requirements for high-voltage test equipment.

Typical Applications

• Power cable routine & type testing

• Bushings, insulators, and surge arrester validation

• Transformer induced voltage tests

• Research lab high-voltage experiments

• Partial discharge calibration systems

Why Choose the LQTT-400kV/140kVA?

"Engineered for precision in critical high-voltage test environments where measurement integrity and equipment safety are non-negotiable. With industry-leading PD performance and thermal stability, this transformer delivers uncompromising reliability for certification testing, R&D, and quality assurance."

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